Needleless syringe provided with an inner seal containing the active principle
US6835187B2 · kind B2 · utility
15Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Sep 4, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/2046
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The technical field of the invention is that of needleless syringes used for injecting active principles in powder form for therapeutic purposes. The invention concerns a needleless syringe (1) comprising successively a gas generator (2), a gas expanding chamber (3), means for retaining active particles and an ejection tube (4). The invention is characterised in that the particle retaining means consists of an inner seal (14) having at least a cavity (15), the inner seal (14) serves both to contain the active principle and to generate a shock wave when it is ruptured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.